<template>
  <a-popover
    v-model="visible"
    trigger="click"
    placement="bottomRight"
    overlayClassName="header-notice-wrapper"
    :getPopupContainer="() => $refs.noticeRef.parentElement"
    :autoAdjustOverflow="true"
    :arrowPointAtCenter="true"
    :overlayStyle="{ width: '300px', top: '50px' }"
  >
    <template slot="content">
      <a-spin :spinning="loading">
        <a-tabs>
          <a-tab-pane tab="通知" key="1">
            <a-list>
              <a-list-item>
                <a-list-item-meta
                  title="你收到了 14 份新周报"
                  description="一年前"
                >
                  <a-avatar
                    style="background-color: white"
                    slot="avatar"
                    src="https://gw.alipayobjects.com/zos/rmsportal/ThXAXghbEsBCCSDihZxY.png"
                  />
                </a-list-item-meta>
              </a-list-item>
              <a-list-item>
                <a-list-item-meta
                  title="你推荐的 曲妮妮 已通过第三轮面试"
                  description="一年前"
                >
                  <a-avatar
                    style="background-color: white"
                    slot="avatar"
                    src="https://gw.alipayobjects.com/zos/rmsportal/OKJXDXrmkNshAMvwtvhu.png"
                  />
                </a-list-item-meta>
              </a-list-item>
              <a-list-item>
                <a-list-item-meta
                  title="这种模板可以区分多种通知类型"
                  description="一年前"
                >
                  <a-avatar
                    style="background-color: white"
                    slot="avatar"
                    src="https://gw.alipayobjects.com/zos/rmsportal/kISTdvpyTAhtGxpovNWd.png"
                  />
                </a-list-item-meta>
              </a-list-item>
            </a-list>
          </a-tab-pane>
          <a-tab-pane tab="消息" key="2"> 123 </a-tab-pane>
          <a-tab-pane tab="待办" key="3"> 123 </a-tab-pane>
        </a-tabs>
      </a-spin>
    </template>
    <span
      @click="fetchNotice"
      class="header-notice"
      ref="noticeRef"
      style="padding: 0 18px"
    >
      <a-badge count="12">
        <a-icon style="font-size: 16px; padding: 4px" type="bell" />
      </a-badge>
    </span>
  </a-popover>
</template>

<script>
export default {
  name: "HeaderNotice",
  data() {
    return {
      loading: false,
      visible: false,
    };
  },
  methods: {
    fetchNotice() {
      if (!this.visible) {
        this.loading = true;
        setTimeout(() => {
          this.loading = false;
        }, 2000);
      } else {
        this.loading = false;
      }
      this.visible = !this.visible;
    },
  },
};
</script>

<style lang="css">
.header-notice-wrapper {
  top: 50px !important;
}
</style>
<style lang="less" scoped>
.header-notice {
  display: inline-block;
  transition: all 0.3s;

  span {
    vertical-align: initial;
  }
}
</style>